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Finding the Fourth Proportional to 638,573.87, 956,776.87 and 385,322.21

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Solution

The fourth proportional to 638,573.87, 956,776.87 and 385,322.21 is: 577,329.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,573.87 : 956,776.87 = 385,322.21 : x
  2. Step 2: Convert to fraction form
    638,573.87/956,776.87 = 385,322.21/x
  3. Step 3: Cross multiply
    638,573.87x = 956,776.87 × 385,322.21
  4. Step 4: Simplify right side
    638,573.87x = 368,667,373,241.40
  5. Step 5: Solve for x
    x = 368,667,373,241.40/638,573.87
  6. Step 6: Final answer
    x = 577,329.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.